Hi again *A Easiness/ how the E-factor of a given item is modified* "Well, with grade 5 you do see an increase of easiness of 0.10 :-) For failing grades, the easiness is indeed not changed. All of this is exactly as prescribed by the original SM2 algorithm"
*I fail to see that for card 2 this is according to SM-2 algorithm. * I find a description of the SM-2 algorithm here http://www.supermemo.com/english/ol/sm2.htm It says: «EF':=EF+{0.1-(5-q)*[0.08+(5-q)*0.02]} where: EF' - new value of the E-Factor, EF - old value of the E-Factor, q - quality of the response in the 0-5 grade scale. If EF is less than 1.3 then let EF be 1.3.» In my "card 2" example EF = 2.46 q = 0 I) EF':=EF+{0.1-(5-q)*[0.08+(5-q)*0.02]} II) EF':=2.46+{0.1-(5-0)*[0.08+(5-0)*0.02]} III) EF':=2.46+{0.1-(5)*[0.08+(5)*0.02]} IV) EF':=2.46+{0.1-(5)*[0.08+0.1]} V) EF':=2.46+{0.1-(5)*[0.18]} VI) EF':=2.46+{0.1-0.9} VII) EF':=2.46+{-0.8} VIII) EF' = 1.66 (Excuse all the details and step, but I haven't done maths for some years so I need all the steps to understand where we differ in interpretation of algorithm :-) ) For card 2 with old E-factor = 2.46 I expect new value of E-factor to become *1.66. * *1) Where do I go wrong? * *2) Under what circumstance does the E-factor decrease?* . *B Terminology:* 1) Is "Repetitions" (in Stat) same ac "Review reps" (in Browse Cards)? 2) In Card Statistics I find "Scheduled interval". What is the equivalent in Browse Cards? Best regards Henrik On Sunday, 5 August 2012 17:02:23 UTC+2, Peter Bienstman wrote: > > Quoting "Henrik in Oslo" <[email protected]>: > > > I have for 3-4 weeks not included a couple of tags in my daily learning. > I > > checked the effect of different gradings on some cards and was very > > surprised that "Easiness" remains practically unchanged whatever grade I > > give to these cards. > > Well, with grade 5 you do see an increase of easiness of 0.10 :-) For > failing grades, the easiness is indeed not changed. > > All of this is exactly as prescribed by the original SM2 algorithm. > > > A minor > > comment: The terminology is not altogether the same between "Show > > statistics" (Ctrl T) and "Browse Cards" > > Could you please elaborate? > > Thanks! > > Peter > > > -- You received this message because you are subscribed to the Google Groups "mnemosyne-proj-users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msg/mnemosyne-proj-users/-/wTcNxmBCgvAJ. For more options, visit https://groups.google.com/groups/opt_out.
